<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>栅格布局</title>
    <link rel="stylesheet" href="./sange.css">
</head>
<body>
    <article>
        <p>1</p>
        <p>2</p>
        <p>3</p>
        <p>4</p>
        <p>5</p>
        <p>6</p>
        <p>7</p>
        <!-- <p>8</p> -->
        <!-- <p class="child-p">9</p> -->
    </article>
</body>
</html>